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Chemical Engineering :: Stoichiometry

  1. The OH⁻ concentration in a solution having pH value 3 is

  2. A.

     10-3

    B.

     10-10

    C.

     10-11

    D.

     10-13

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  3. The viscosity of water at room temperature may be around one

  4. A.

     Centipoise

    B.

     Poise

    C.

     Stoke

    D.

     Both B & C

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  5. A vapor that exists above its critical temperature is termed as a __________ vapor.

  6. A.

     Saturated

    B.

     Unsaturated

    C.

     Gaseous

    D.

     Sub-cooled

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  7. A gas at 0°C was subjected to constant pressure cooling until its volume became half the original volume. The temperature of the gas at this stage will be

  8. A.

     0°C

    B.

     0°K

    C.

     -136.5°C

    D.

     -136.5°K

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  9. A gas at 0°C is cooled at constant pressure until its volume becomes half the original volume. The temperature of the gas at this state will be

  10. A.

     -136.5°C

    B.

     - 136.5°K

    C.

     -273°C

    D.

     0°K

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  11. Which of the following is not a unit of kinematic viscosity?

  12. A.

     Poise

    B.

     Stoke

    C.

     Cm²/second

    D.

     None of these

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  13. The density of a gas 'X' is twice that of another gas 'Y'. If the molecular weight of gas 'Y' is 'M'; then the molecular weight of the gas 'X' will be

  14. A.

     2M

    B.

     M/2

    C.

     M

    D.

     M/4

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  15. Pick out the wrong statement.

  16. A.

     Heat capacity of a diatomic gas is higher than that of a monoatomic gas

    B.

     Equal volumes of Argon and Krypton contain equal number of atoms

    C.

     Total number of molecules contained in 22.4 litres of hydrogen at NTP is 6.023 x 1023

    D.

     The binary mixture of a particular com-positidn in both vapor and liquid state is known as an azeotropic mixture

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  17. Ideal solution is formed, when its components have zero

  18. A.

     Heat of mixing

    B.

     Volume change

    C.

     Both A & B

    D.

     Neither A nor B

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  19. The heat evolved in the combustion of benzene is represented by the equation:
    C₆H₆ + 7.5 O₂ = 6CO₂ + 3H₂O, ΔH = 3264.6 kJ/kg. mole
    The heat energy change, when 39 gm of C₆H₆ is burnt in an open container, will be __________ kJ/kgmole.

  20. A.

     +816.15

    B.

     +1632.3

    C.

     -1632.3

    D.

     -2448.45

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